1
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Zhao H, Jose AT, Asany A, Khan SM, Biscoe MR. Pd-Catalyzed Arylation of Secondary α-Alkoxytricyclohexylstannanes. Org Lett 2022; 24:8714-8718. [PMID: 36399722 DOI: 10.1021/acs.orglett.2c03729] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We have developed a general process for the formation of α-arylethers via the Pd-catalyzed arylation of secondary α-alkoxytricyclohexylstannanes. Incorporation of cyclohexyl spectator ligands into the alkylstannane and the use of the electron-deficient ligand JackiePhos (1) are critical for achieving selective alkyl transfer in this process. This system circumvents the need for a coordinating/directing oxygen-protecting group to promote selective alkyl transfer and enables α-tetrahydropyran, α-tetrahydrofuran, and open-chain secondary α-alkoxy groups to be employed efficiently in Pd-catalyzed Stille reactions with a broad range of aryl electrophiles. These findings suggest that selective transmetalation of a single marginally activated secondary alkyl unit from Sn to Pd should be broadly achievable provided that unactivated secondary alkyl ligands comprise the other three groups of the tetraalkylstannane.
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Affiliation(s)
- Haoran Zhao
- Department of Chemistry & Biochemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, New York 10031, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, New York 10016, United States
| | - Anju Treesa Jose
- Department of Chemistry & Biochemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, New York 10031, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, New York 10016, United States
| | - Alisajat Asany
- Department of Chemistry & Biochemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, New York 10031, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, New York 10016, United States
| | - Shahrukh M. Khan
- Department of Chemistry & Biochemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, New York 10031, United States
| | - Mark R. Biscoe
- Department of Chemistry & Biochemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, New York 10031, United States
- Ph.D. Program in Chemistry, The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, New York 10016, United States
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2
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Akagawa H, Tsuchiya N, Morinaga A, Katayama Y, Sumimoto M, Nishikata T. Carboxamide-Directed Stereospecific Couplings of Chiral Tertiary Alkyl Halides with Terminal Alkynes. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiroki Akagawa
- Graiduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Naoki Tsuchiya
- Graiduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Asuka Morinaga
- Graiduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Yu Katayama
- Graiduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Michinori Sumimoto
- Graiduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Takashi Nishikata
- Graiduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
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3
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Casnati A, Lichosyt D, Lainer B, Veth L, Dydio P. Multicatalytic Approach to One-Pot Stereoselective Synthesis of Secondary Benzylic Alcohols. Org Lett 2021; 23:3502-3506. [DOI: 10.1021/acs.orglett.1c00939] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Alessandra Casnati
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, 67000 Strasbourg, France
| | - Dawid Lichosyt
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, 67000 Strasbourg, France
| | - Bruno Lainer
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, 67000 Strasbourg, France
| | - Lukas Veth
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, 67000 Strasbourg, France
| | - Paweł Dydio
- University of Strasbourg, CNRS, ISIS UMR 7006, 8 Allée Gaspard Monge, 67000 Strasbourg, France
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4
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Stereoselectivity in Pd-catalysed cross-coupling reactions of enantioenriched nucleophiles. Nat Rev Chem 2020; 4:584-599. [PMID: 33869786 DOI: 10.1038/s41570-020-00222-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Advances in Pd-catalysed cross-coupling reactions have facilitated the development of stereospecific variants enabling the use of configurationally stable, enantioenriched, main-group organometallic nucleophiles to form C(sp 3)-C(sp 2) bonds. Such stereospecific cross-coupling reactions constitute a powerful synthetic approach to attaining precise 3D control of molecular structure, allowing new stereogenic centres to be readily introduced into molecular architectures. Examples of stereospecific, Pd-catalysed cross-coupling reactions have been reported for isolable enantioenriched alkylboron, alkyltin, alkylgermanium and alkylsilicon nucleophiles. In these reactions, a single, dominant stereospecific pathway of transmetallation to palladium is required to effect efficient chirality transfer to the cross-coupled product. However, the potential for competing stereoretentive and stereoinvertive pathways of transmetallation complicates the stereochemical transfer in these processes and impedes the rational development of new stereospecific cross-coupling variants. In this Review, we describe the use of enantioenriched organometallic nucleophiles in stereospecific, Pd-catalysed cross-coupling reactions. We focus on systems involving well-defined, isolable, enantioenriched nucleophiles in which a clear stereochemical course of transmetallation is followed. Specific modes of electronic activation that influence the reactivity of alkylmetal nucleophiles are described and presented in the context of their impact on the stereochemical course of cross-coupling reactions. We expect that this Review will serve as a valuable resource to assist in deconvoluting the many considerations that potentially impact the stereochemical outcome of Pd-catalysed cross-coupling reactions.
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5
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Zhu F, Chen Z, Walczak MA. Ligand-Free Copper(I)-Mediated Cross-Coupling Reactions of Organostannanes with Sulfur Electrophiles. J Org Chem 2020; 85:11942-11951. [PMID: 32902269 DOI: 10.1021/acs.joc.0c01399] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The synthesis of aryl thioether through the cross-coupling of C-S bond is a highly attractive area of research due to the prevalence of aryl thioether in bioactive natural products, functional materials, agrochemicals, and pharmaceutically active compounds. Herein, we report a ligand-free Cu(I) mediated electrophilic thiolation of organostannanes with sulfur electrophiles. A selective transfer of alkyl groups was achieved in reactions with alkyl carbastannatranes affording congested thioethers. This study offers a unified method to access diaryl and aryl alkyl thioethers and was demonstrated in the context of late-stage modifications..
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Affiliation(s)
- Feng Zhu
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Zhenhao Chen
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Maciej A Walczak
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
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6
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Zhu F, Zhang SQ, Chen Z, Rui J, Hong X, Walczak MA. Catalytic and Photochemical Strategies to Stabilized Radicals Based on Anomeric Nucleophiles. J Am Chem Soc 2020; 142:11102-11113. [PMID: 32479072 DOI: 10.1021/jacs.0c03298] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Carbohydrates, one of the three primary macromolecules of living organisms, play significant roles in various biological processes such as intercellular communication, cell recognition, and immune activity. While the majority of established methods for the installation of carbohydrates through the anomeric carbon rely on nucleophilic displacement, anomeric radicals represent an attractive alternative because of their functional group compatibility and high anomeric selectivities. Herein, we demonstrate that anomeric nucleophiles such as C1 stannanes can be converted into anomeric radicals by merging Cu(I) catalysis with blue light irradiation to achieve highly stereoselective C(sp3)-S cross-coupling reactions. Mechanistic studies and DFT calculations revealed that the C-S bond-forming step occurs via the transfer of the anomeric radical directly to a sulfur electrophile bound to Cu(II) species. This pathway complements a radical chain observed for photochemical metal-free conditions where a disulfide initiator can be activated by a Lewis base additive. Both strategies utilize anomeric nucleophiles as efficient radical donors and achieve a switch from an ionic to a radical pathway. Taken together, the stability of glycosyl nucleophiles, a broad substrate scope, and high anomeric selectivities observed for the thermal and photochemical protocols make this novel C-S cross coupling a practical tool for late-stage glycodiversification of bioactive natural products and drug candidates.
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Affiliation(s)
- Feng Zhu
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Shuo-Qing Zhang
- Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou, Zhejiang 310027, People's Republic of China
| | - Zhenhao Chen
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Jinyan Rui
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
| | - Xin Hong
- Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou, Zhejiang 310027, People's Republic of China
| | - Maciej A Walczak
- Department of Chemistry, University of Colorado, Boulder, Colorado 80309, United States
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7
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Yoshinaga Y, Yamamoto T, Suginome M. Stereoinvertive C–C Bond Formation at the Boron‐Bound Stereogenic Centers through Copper‐Bipyridine‐Catalyzed Intramolecular Coupling of α‐Aminobenzylboronic Esters. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yukako Yoshinaga
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University, Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Takeshi Yamamoto
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University, Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University, Katsura, Nishikyo-ku Kyoto 615-8510 Japan
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8
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Yoshinaga Y, Yamamoto T, Suginome M. Stereoinvertive C–C Bond Formation at the Boron‐Bound Stereogenic Centers through Copper‐Bipyridine‐Catalyzed Intramolecular Coupling of α‐Aminobenzylboronic Esters. Angew Chem Int Ed Engl 2020; 59:7251-7255. [DOI: 10.1002/anie.201914864] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 01/24/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Yukako Yoshinaga
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University, Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Takeshi Yamamoto
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University, Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry Graduate School of Engineering Kyoto University, Katsura, Nishikyo-ku Kyoto 615-8510 Japan
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9
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Lee H, Lee S, Yun J. Pd-Catalyzed Stereospecific Cross-Coupling of Chiral α-Borylalkylcopper Species with Aryl Bromides. ACS Catal 2020. [DOI: 10.1021/acscatal.9b05213] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Hyesu Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Korea
| | - Soyeon Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Korea
| | - Jaesook Yun
- Department of Chemistry, Sungkyunkwan University, Suwon 16419, Korea
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10
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Yabushita K, Yuasa A, Nagao K, Ohmiya H. Asymmetric Catalysis Using Aromatic Aldehydes as Chiral α-Alkoxyalkyl Anions. J Am Chem Soc 2018; 141:113-117. [PMID: 30561196 DOI: 10.1021/jacs.8b11495] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have developed a new umpolung strategy for catalytically forming a chiral α-alkoxyalkyl anion from an aromatic aldehyde for use in asymmetric synthesis. The reaction between aromatic aldehydes and aryl or allyl electrophiles with a silylboronate utilizing a chiral copper-N-heterocyclic carbene catalyst and a palladium-bisphosphine catalyst in a synergistic manner occurred with high enantioselectivities to deliver the three-component coupling products, chiral silyl-protected secondary alcohol derivatives. Our method features the catalytic generation of enantioenriched chiral α-alkoxyalkylcopper(I) intermediates from aldehydes and their subsequent palladium-catalyzed stereospecific cross-coupling.
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Affiliation(s)
- Kenya Yabushita
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences , Kanazawa University , Kakuma-machi, Kanazawa 920-1192 , Japan
| | - Akihiro Yuasa
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences , Kanazawa University , Kakuma-machi, Kanazawa 920-1192 , Japan
| | - Kazunori Nagao
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences , Kanazawa University , Kakuma-machi, Kanazawa 920-1192 , Japan
| | - Hirohisa Ohmiya
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences , Kanazawa University , Kakuma-machi, Kanazawa 920-1192 , Japan
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11
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Zhu F, O'Neill S, Rodriguez J, Walczak MA. Rethinking Carbohydrate Synthesis: Stereoretentive Reactions of Anomeric Stannanes. Chemistry 2018; 25:3147-3155. [PMID: 30051523 DOI: 10.1002/chem.201803082] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Indexed: 12/29/2022]
Abstract
In this Concept article, recent advances are highlighted in the synthesis and applications of anomeric nucleophiles, a class of carbohydrates in which the C1 carbon bears a carbon-metal bond. First, the advantages of exploiting the carboanionic reactivity of carbohydrates and the methods for the synthesis of mono- and oligosaccharide stannanes are discussed. Second, recent developments in the glycosyl cross-coupling method resulting in the transfer of anomeric configuration from C1 stannanes to C-aryl glycosides are reviewed. These highly stereoretentive processes are ideally suited for the preparation of carbohydrate-based therapeutics and were demonstrated in the synthesis of antidiabetic drugs. Next, the application of the glycosyl cross-coupling method to the preparation of Se-glycosides and to glycodiversification of small molecules and peptides are highlighted. These reactions proceed with exclusive anomeric control for a broad range of substrates and tolerate carbohydrates with free hydroxyl groups. Taken together, anomeric nucleophiles have emerged as powerful tools for the synthesis of oligosaccharides and glycoconjugates and their future applications will open new possibilities to incorporate saccharides into small molecules and biologics.
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Affiliation(s)
- Feng Zhu
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, 80309, United States
| | - Sloane O'Neill
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, 80309, United States
| | - Jacob Rodriguez
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, 80309, United States
| | - Maciej A Walczak
- Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO, 80309, United States
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12
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Abstract
Cross-coupling reactions are a staple in organic synthesis, especially for C-C bond formation with sp- and sp2-carbon electrophiles. In recent years, the range of accessible C-C bonds has been extended to stereogenic centers which expedites access to greater molecular complexity. However, these reactions predominantly depend upon late transition metal (LTM) catalysts whose cost, toxicity, and/or environmental impact have come under increasing scrutiny and governmental regulation. Here, we report Mn(II)Cl2 complexes alone, or with assistance from copper, catalyze the stereospecific cross-coupling of α-alkoxyalkylstannanes with organic electrophiles with complete retention of configuration.
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Affiliation(s)
- Rambabu Dakarapu
- Division of Chemistry, Department of Biochemistry, University of Texas Southwestern Medical Center , Dallas, Texas 75390, United States
| | - John R Falck
- Division of Chemistry, Department of Biochemistry, University of Texas Southwestern Medical Center , Dallas, Texas 75390, United States
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13
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Campbell PS, Jamieson C, Simpson I, Watson AJB. Practical synthesis of pharmaceutically relevant molecules enriched in sp3 character. Chem Commun (Camb) 2018; 54:46-49. [DOI: 10.1039/c7cc08670a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A highly efficient and general procedure for the preparation of medicinally relevant compounds with enhanced 3D character is reported.
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Affiliation(s)
- Peter S. Campbell
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - Craig Jamieson
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - Iain Simpson
- Medicinal Chemistry
- Oncology IMED Biotech Unit
- AstraZeneca
- Cambridge
- UK
| | - Allan J. B. Watson
- Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
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14
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Alam R, Molander GA. Direct Synthesis of Secondary Benzylic Alcohols Enabled by Photoredox/Ni Dual-Catalyzed Cross-Coupling. J Org Chem 2017; 82:13728-13734. [PMID: 29172494 PMCID: PMC5732067 DOI: 10.1021/acs.joc.7b02589] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
An operationally simple, mild, redox-neutral method for the cross-coupling of α-hydroxyalkyltrifluoroborates is reported. Utilizing an Ir photocatalyst, α-hydroxyalkyl radicals are generated from the single-electron oxidation of the trifluoroborates, and these radicals are subsequently engaged in a nickel-catalyzed C-C bond-forming reaction with aryl halides. The process is highly selective, functional group tolerant, and step economical, which allows the direct synthesis of secondary benzylic alcohol motifs.
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Affiliation(s)
- Rauful Alam
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323
| | - Gary A. Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323
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15
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Zhu F, Rodriguez J, Yang T, Kevlishvili I, Miller E, Yi D, O'Neill S, Rourke MJ, Liu P, Walczak MA. Glycosyl Cross-Coupling of Anomeric Nucleophiles: Scope, Mechanism, and Applications in the Synthesis of Aryl C-Glycosides. J Am Chem Soc 2017; 139:17908-17922. [PMID: 29148749 DOI: 10.1021/jacs.7b08707] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Stereoselective manipulations at the C1 anomeric position of saccharides are one of the central goals of preparative carbohydrate chemistry. Historically, the majority of reactions forming a bond with anomeric carbon has focused on reactions of nucleophiles with saccharide donors equipped with a leaving group. Here, we describe a novel approach to stereoselective synthesis of C-aryl glycosides capitalizing on the highly stereospecific reaction of anomeric nucleophiles. First, methods for the preparation of anomeric stannanes have been developed and optimized to afford both anomers of common saccharides in high anomeric selectivities. We established that oligosaccharide stannanes could be prepared from monosaccharide stannanes via O-glycosylation with Schmidt-type donors, glycal epoxides, or under dehydrative conditions with C1 alcohols. Second, we identified a general set of catalytic conditions with Pd2(dba)3 (2.5 mol%) and a bulky ligand (JackiePhos, 10 mol%) controlling the β-elimination pathway. We demonstrated that the glycosyl cross-coupling resulted in consistently high anomeric selectivities for both anomers with mono- and oligosaccharides, deoxysugars, saccharides with free hydroxyl groups, pyranose, and furanose substrates. The versatility of the glycosyl cross-coupling reaction was probed in the total synthesis of salmochelins (siderophores) and commercial anti-diabetic drugs (gliflozins). Combined experimental and computational studies revealed that the β-elimination pathway is suppressed for biphenyl-type ligands due to the shielding of Pd(II) by sterically demanding JackiePhos, whereas smaller ligands, which allow for the formation of a Pd-F complex, predominantly result in a glycal product. Similar steric effects account for the diminished rates of cross-couplings of 1,2-cis C1-stannanes with aryl halides. DFT calculations also revealed that the transmetalation occurs via a cyclic transition state with retention of configuration at the anomeric position. Taken together, facile access to both anomers of various glycoside nucleophiles, a broad reaction scope, and uniformly high transfer of anomeric configuration make the glycosyl cross-coupling reaction a practical tool for the synthesis of bioactive natural products, drug candidates, allowing for late-stage glycodiversification studies with small molecules and biologics.
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Affiliation(s)
- Feng Zhu
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Jacob Rodriguez
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Tianyi Yang
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Ilia Kevlishvili
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
| | - Eric Miller
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Duk Yi
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Sloane O'Neill
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Michael J Rourke
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh , Pittsburgh, Pennsylvania 15260, United States
| | - Maciej A Walczak
- Department of Chemistry and Biochemistry, University of Colorado , Boulder, Colorado 80309, United States
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16
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Wang CY, Ralph G, Derosa J, Biscoe MR. Stereospecific Palladium-Catalyzed Acylation of Enantioenriched Alkylcarbastannatranes: A General Alternative to Asymmetric Enolate Reactions. Angew Chem Int Ed Engl 2017; 56:856-860. [PMID: 27981696 PMCID: PMC6078499 DOI: 10.1002/anie.201609930] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Indexed: 11/07/2022]
Abstract
We report the development of a Pd-catalyzed process for the cross coupling of unactivated primary, secondary, and tertiary alkylcarbastannatrane nucleophiles with acyl electrophiles. Reactions involving optically active alkylcarbastannatranes occur with exceptional stereofidelity and with net retention of absolute configuration. Because the stereochemistry of the resulting products is entirely reagent-controlled, this process may be viewed as a general, alternative approach to the preparation of products typically accessed via asymmetric enolate methodologies. Additionally, we report a new method for the preparation of optically active alkylcarbastannatranes, which should facilitate their future use in stereospecific reactions.
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Affiliation(s)
- Chao-Yuan Wang
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, NY, 10031, USA
- The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, NY, 10016, USA
| | - Glenn Ralph
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, NY, 10031, USA
- The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, NY, 10016, USA
| | - Joseph Derosa
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, NY, 10031, USA
| | - Mark R Biscoe
- Department of Chemistry, The City College of New York (CCNY), 160 Convent Avenue, New York, NY, 10031, USA
- The Graduate Center of the City University of New York (CUNY), 365 Fifth Avenue, New York, NY, 10016, USA
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17
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Si T, Li B, Xiong W, Xu B, Tang W. Efficient cross-coupling of aryl/alkenyl triflates with acyclic secondary alkylboronic acids. Org Biomol Chem 2017; 15:9903-9909. [DOI: 10.1039/c7ob02531a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Efficient cross-coupling between aryl/alkenyl triflates and acyclic secondary alkylboronic acids is realized by employing P,PO ligand L1/L2, providing a series of sterically congested acyclic secondary alkyl arenes/olefins in good to excellent yields. The method has enabled a concise and 4-step synthesis of a gossypol intermediate.
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Affiliation(s)
- Tengda Si
- Department of Chemistry
- Shanghai University
- Shanghai 200444
- China
| | - Bowen Li
- State Key Laboratory of Bio-Organic and Natural Products Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Wenrui Xiong
- State Key Laboratory of Bio-Organic and Natural Products Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
| | - Bin Xu
- Department of Chemistry
- Shanghai University
- Shanghai 200444
- China
| | - Wenjun Tang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- China
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18
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Wang C, Ralph G, Derosa J, Biscoe MR. Stereospecific Palladium‐Catalyzed Acylation of Enantioenriched Alkylcarbastannatranes: A General Alternative to Asymmetric Enolate Reactions. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201609930] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Chao‐Yuan Wang
- Department of Chemistry The City College of New York (CCNY) 160 Convent Avenue New York NY 10031 USA
- The Graduate Center of the City University of New York (CUNY) 365 Fifth Avenue New York NY 10016 USA
| | - Glenn Ralph
- Department of Chemistry The City College of New York (CCNY) 160 Convent Avenue New York NY 10031 USA
- The Graduate Center of the City University of New York (CUNY) 365 Fifth Avenue New York NY 10016 USA
| | - Joseph Derosa
- Department of Chemistry The City College of New York (CCNY) 160 Convent Avenue New York NY 10031 USA
| | - Mark R. Biscoe
- Department of Chemistry The City College of New York (CCNY) 160 Convent Avenue New York NY 10031 USA
- The Graduate Center of the City University of New York (CUNY) 365 Fifth Avenue New York NY 10016 USA
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19
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Kamimura A, Tanaka T, So M, Itaya T, Matsuda K, Kawamoto T. A regioselective double Stille coupling reaction of bicyclic stannolanes. Org Biomol Chem 2016; 14:8109-22. [PMID: 27506959 DOI: 10.1039/c6ob01018k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A regioselective double Stille coupling reaction was explored using bicyclic stannolanes that were easily prepared from the radical cascade reaction of β-amino-α-methylene esters. Various 1-bromo-2-iodoarenes underwent the double coupling reaction to afford benzoisoindole derivatives in a regioselective manner, where the carbon attached to the iodine selectively coupled with the vinylic carbon, and then the carbon attached to bromine coupled with the alkyl carbon. The combination of intra- and intermolecular coupling reactions provided hexahydroindeno[1,2-b]pyrrole derivatives in good yields. The yields were further improved in the presence of excess amounts of CsF. An attempt to identify the reaction intermediate was made wherein the decomposition of the stannolanes with aqueous HCl and HBr afforded trigonal bipyramidal (TBP) pentacoordinated tin complexes, as confirmed by microanalyses and (119)Sn NMR. Using DCl for the decomposition selectively introduced a deuterium to the E-position of the exomethylene unit. The complexes smoothly underwent the intramolecular Stille coupling reaction in the presence of both a palladium catalyst and DABCO, affording hexahydroindeno[1,2-b]pyrroles in good yields. These results suggest that the double coupling reaction progresses through a TBP tin complex, promoting the second intramolecular coupling reaction between the aryl halide and Csp(3)-tin bond.
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Affiliation(s)
- Akio Kamimura
- Department of Applied Molecular Bioscience, Graduate School of Medicine, Yamaguchi University, Ube 755-8611, Japan.
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20
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Li C, Zhang Y, Sun Q, Gu T, Peng H, Tang W. Transition-Metal-Free Stereospecific Cross-Coupling with Alkenylboronic Acids as Nucleophiles. J Am Chem Soc 2016; 138:10774-7. [PMID: 27515390 DOI: 10.1021/jacs.6b06285] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We herein report a transition-metal-free cross-coupling between secondary alkyl halides/mesylates and aryl/alkenylboronic acid, providing expedited access to a series of nonchiral/chiral coupling products in moderate to good yields. Stereospecific SN2-type coupling is developed for the first time with alkenylboronic acids as pure nucleophiles, offering an attractive alternative to the stereospecific transition-metal-catalyzed C(sp(2))-C(sp(3)) cross-coupling.
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Affiliation(s)
- Chengxi Li
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences , 345 Ling Ling Road, Shanghai 200032, China
| | - Yuanyuan Zhang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences , 345 Ling Ling Road, Shanghai 200032, China
| | - Qi Sun
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences , 345 Ling Ling Road, Shanghai 200032, China
| | - Tongnian Gu
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences , 345 Ling Ling Road, Shanghai 200032, China
| | - Henian Peng
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences , 345 Ling Ling Road, Shanghai 200032, China
| | - Wenjun Tang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences , 345 Ling Ling Road, Shanghai 200032, China
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21
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Karimi-Nami R, Tellis JC, Molander GA. Single-Electron Transmetalation: Protecting-Group-Independent Synthesis of Secondary Benzylic Alcohol Derivatives via Photoredox/Nickel Dual Catalysis. Org Lett 2016; 18:2572-5. [PMID: 27218884 PMCID: PMC4900145 DOI: 10.1021/acs.orglett.6b00911] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Indexed: 11/29/2022]
Abstract
Protecting-group-independent cross-coupling of α-alkoxyalkyl- and α-acyloxyalkyltrifluoroborates with aryl and heteroaryl bromides is achieved through application of photoredox/nickel dual catalysis. Reactions occur under exceptionally mild conditions, with outstanding functional group compatibility and excellent observed tolerance of heteroarenes. This method offers expedient access to protected secondary benzylic alcohol motifs bearing benzyl, pivaloyl, and N,N-diisopropylcarbamoyl protecting groups.
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Affiliation(s)
- Rahman Karimi-Nami
- Roy and Diana Vagelos Laboratories, Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
- School
of Chemistry, University College of Science, University of Tehran, P.O. Box 14155-6455, 14174 Tehran, Iran
| | - John C. Tellis
- Roy and Diana Vagelos Laboratories, Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Gary A. Molander
- Roy and Diana Vagelos Laboratories, Department
of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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22
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Mita T, Saito K, Sugawara M, Sato Y. Stereoretentive Addition ofN-tert-Butylsulfonyl-α-Amido Silanes to Aldehydes, Ketones, α,β-Unsaturated Esters, and Imines. Chem Asian J 2016; 11:1528-31. [DOI: 10.1002/asia.201600270] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Tsuyoshi Mita
- Faculty of Pharmaceutical Sciences; Hokkaido University; Kita 12, Nishi 6, Kita-ku Sapporo 060-0812 Japan
| | - Keisuke Saito
- Faculty of Pharmaceutical Sciences; Hokkaido University; Kita 12, Nishi 6, Kita-ku Sapporo 060-0812 Japan
| | - Masumi Sugawara
- Faculty of Pharmaceutical Sciences; Hokkaido University; Kita 12, Nishi 6, Kita-ku Sapporo 060-0812 Japan
| | - Yoshihiro Sato
- Faculty of Pharmaceutical Sciences; Hokkaido University; Kita 12, Nishi 6, Kita-ku Sapporo 060-0812 Japan
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23
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Wang CY, Derosa J, Biscoe MR. Configurationally Stable, Enantioenriched Organometallic Nucleophiles in Stereospecific Pd-Catalyzed Cross-Coupling Reactions: An Alternative Approach to Asymmetric Synthesis. Chem Sci 2015; 6:5105-5113. [PMID: 26388985 PMCID: PMC4571484 DOI: 10.1039/c5sc01710f] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2015] [Accepted: 06/30/2015] [Indexed: 01/28/2023] Open
Abstract
Several research groups have recently developed methods to employ configurationally stable, enantioenriched organometallic nucleophiles in stereospecific Pd-catalyzed cross-coupling reactions. By establishing the absolute configuration of a chiral alkyltin or alkylboron nucleophile prior to its use in cross-coupling reactions, new stereogenic centers may be rapidly and reliably generated with preservation of the known initial stereochemistry. While this area of research is still in its infancy, such stereospecific cross-coupling reactions may emerge as simple, general methods to access diverse, optically active products from common enantioenriched organometallic building blocks. This minireview highlights recent progress towards the development of general, stereospecific Pd-catalyzed cross-coupling reactions using configurationally stable organometallic nucleophiles.
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Affiliation(s)
- Chao-Yuan Wang
- Department of Chemistry , The City College of New York (CCNY) , 160 Convent Avenue , New York NY 10031 , USA .
- The Graduate Center of the City University of New York (CUNY) , 365 Fifth Avenue , New York NY 10016 , USA
| | - Joseph Derosa
- Department of Chemistry , The City College of New York (CCNY) , 160 Convent Avenue , New York NY 10031 , USA .
| | - Mark R. Biscoe
- Department of Chemistry , The City College of New York (CCNY) , 160 Convent Avenue , New York NY 10031 , USA .
- The Graduate Center of the City University of New York (CUNY) , 365 Fifth Avenue , New York NY 10016 , USA
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24
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Marsch N, Jones PG, Lindel T. SmI2-mediated dimerization of indolylbutenones and synthesis of the myxobacterial natural product indiacen B. Beilstein J Org Chem 2015; 11:1700-6. [PMID: 26664588 PMCID: PMC4660955 DOI: 10.3762/bjoc.11.184] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 08/31/2015] [Indexed: 01/14/2023] Open
Abstract
The synthesis and reactivity of indole derivatives substituted in the benzene section was studied. Starting materials 4- and 6-iodoindole were conveniently prepared via the Batcho–Leimgruber route and purified by sublimation. Novel vicinally indolyl-substituted cyclopentanols with unexpected cis-configuration were formed by SmI2-mediated reductive dimerization of a 4-(indol-6-yl)butenone, obtained by Heck reaction. The two indolyl units appear to chelate Sm(II)/(III) leading to a gauche-type arrangement at the newly formed bond between the two β-carbons. Through a sequence of Sonogashira cross coupling and Meyer–Schuster rearrangement 6-prenoylindole was synthesized and reductively dimerized to a cyclopentane in a [3 + 2] cycloaddition by treatment with SmI2 in THF. From 4-iodoindole, the natural product indiacen B from the myxobacterium Sandaracinus amylolyticus was synthesized for the first time, confirming its antimicrobial activity. The E-configuration of the chloroalkene moiety of indiacen B was confirmed by X-ray analysis.
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Affiliation(s)
- Nils Marsch
- Institute of Organic Chemistry, TU Braunschweig, Hagenring 30, 38106 Braunschweig, Germany,
| | - Peter G Jones
- Institute of Inorganic and Analytical Chemistry, TU Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Thomas Lindel
- Institute of Organic Chemistry, TU Braunschweig, Hagenring 30, 38106 Braunschweig, Germany,
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25
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Cherney AH, Kadunce NT, Reisman SE. Enantioselective and Enantiospecific Transition-Metal-Catalyzed Cross-Coupling Reactions of Organometallic Reagents To Construct C-C Bonds. Chem Rev 2015; 115:9587-652. [PMID: 26268813 PMCID: PMC4566132 DOI: 10.1021/acs.chemrev.5b00162] [Citation(s) in RCA: 615] [Impact Index Per Article: 68.3] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Alan H Cherney
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Nathaniel T Kadunce
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Sarah E Reisman
- The Warren and Katharine Schlinger Laboratory for Chemistry and Chemical Engineering, Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
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26
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Karakaya I, Primer D, Molander GA. Photoredox Cross-Coupling: Ir/Ni Dual Catalysis for the Synthesis of Benzylic Ethers. Org Lett 2015; 17:3294-7. [PMID: 26079182 PMCID: PMC4854197 DOI: 10.1021/acs.orglett.5b01463] [Citation(s) in RCA: 98] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Indexed: 11/30/2022]
Abstract
Single-electron transmetalation has emerged as an enabling paradigm for the cross-coupling of Csp(3) hybridized organotrifluoroborates. Cross-coupling of α-alkoxymethyltrifluoroborates with aryl and heteroaryl bromides has been demonstrated by employing dual catalysis with a combination of an iridium photoredox catalyst and a Ni cross-coupling catalyst. The resulting method enables the alkoxymethylation of diverse (hetero)arenes under mild, room-temperature conditions.
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Affiliation(s)
- Idris Karakaya
- Department
of Chemistry, Faculty of Sciences and Letters, Osmaniye Korkut Ata University, 80000 Osmaniye, Turkey
| | - David
N. Primer
- Roy
and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Gary A. Molander
- Roy
and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
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27
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Cordovilla C, Bartolomé C, Martínez-Ilarduya JM, Espinet P. The Stille Reaction, 38 Years Later. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00448] [Citation(s) in RCA: 271] [Impact Index Per Article: 30.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Carlos Cordovilla
- IU CINQUIMA/Química
Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
| | - Camino Bartolomé
- IU CINQUIMA/Química
Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
| | - Jesús M Martínez-Ilarduya
- IU CINQUIMA/Química
Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
| | - Pablo Espinet
- IU CINQUIMA/Química
Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47071 Valladolid, Spain
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28
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Jia T, Cao P, Wang D, Lou Y, Liao J. Copper-catalyzed asymmetric three-component borylstannation: enantioselective formation of C-Sn bond. Chemistry 2015; 21:4918-22. [PMID: 25678384 DOI: 10.1002/chem.201500060] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Indexed: 11/07/2022]
Abstract
In summary, a first copper-catalyzed synthesis of α-aryl-β-borylstannane compounds was accomplished through three-component borylstannation of aryl-substituted alkenes. In the exploration of an asymmetric variant, chiral sulfinylphosphine ligands proved advantageous in controlling stereochemistry of B-Cu addition and in promoting transmetalation of enantioenriched alkyl-Cu species. The stereochemical outcome supported a sequential syn-borylcupration and configuration-retentive transmetalation mechanism. Moreover, α-chiral β-borylstannanes were easily transformed into a diverse array of secondary alkylstannanes and triarylethane with high enantiomeric purity. The applications of chiral sulfinylphosphine ligands to other tandem Cu-B addition reactions are currently under investigation in our group.
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Affiliation(s)
- Tao Jia
- Natural Products Research Center, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041 (China)
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29
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Li C, Chen T, Li B, Xiao G, Tang W. Efficient Synthesis of Sterically Hindered Arenes Bearing Acyclic Secondary Alkyl Groups by Suzuki-Miyaura Cross-Couplings. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201411518] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Li C, Chen T, Li B, Xiao G, Tang W. Efficient Synthesis of Sterically Hindered Arenes Bearing Acyclic Secondary Alkyl Groups by Suzuki-Miyaura Cross-Couplings. Angew Chem Int Ed Engl 2015; 54:3792-6. [DOI: 10.1002/anie.201411518] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Indexed: 11/07/2022]
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31
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Srivastav N, Singh R, Kaur V. Carbastannatranes: a powerful coupling mediators in Stille coupling. RSC Adv 2015. [DOI: 10.1039/c5ra09960a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Carbastannatranes are better coupling mediators in Stille coupling due to easy transfer of axial Sn-bound hydrocarbyl substituent during transmetallation step.
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Affiliation(s)
- Neha Srivastav
- Department of Chemistry
- Panjab University
- Chandigarh-160014
- India
| | - Raghubir Singh
- Department of Chemistry
- D.A.V. College
- Chandigarh-160010
- India
| | - Varinder Kaur
- Department of Chemistry
- Panjab University
- Chandigarh-160014
- India
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32
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Kubota K, Yamamoto E, Ito H. Copper(I)-Catalyzed Enantioselective Nucleophilic Borylation of Aldehydes: An Efficient Route to Enantiomerically Enriched α-Alkoxyorganoboronate Esters. J Am Chem Soc 2014; 137:420-4. [DOI: 10.1021/ja511247z] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Koji Kubota
- Division of Chemical Process Engineering & Frontier Chemistry Center, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Eiji Yamamoto
- Division of Chemical Process Engineering & Frontier Chemistry Center, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
| | - Hajime Ito
- Division of Chemical Process Engineering & Frontier Chemistry Center, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan
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33
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Kamimura A, Ishikawa S. A New Heterocyclic Synthesis Using Asymmetric aza-Morita-Baylis-Hillman Equivalent Reaction. J SYN ORG CHEM JPN 2014. [DOI: 10.5059/yukigoseikyokaishi.72.929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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34
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Vila C, Giannerini M, Hornillos V, Fañanás-Mastral M, Feringa BL. Palladium-catalysed direct cross-coupling of secondary alkyllithium reagents. Chem Sci 2014. [DOI: 10.1039/c3sc53047g] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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35
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Chausset-Boissarie L, Ghozati K, LaBine E, Chen JLY, Aggarwal VK, Crudden CM. Enantiospecific, regioselective cross-coupling reactions of secondary allylic boronic esters. Chemistry 2013; 19:17698-701. [PMID: 24302640 DOI: 10.1002/chem.201303683] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Indexed: 12/13/2022]
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36
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Sakata K, Urabe D, Inoue M. Preparation and palladium-mediated cross-coupling of α-benzoyloxyalkylzinc bromides. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.05.114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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37
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Copper-catalyzed cross-coupling reaction of α-sulfur-substituted alkylstannanes with acid chlorides. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.06.088] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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38
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Swift EC, Jarvo ER. Asymmetric transition metal-catalyzed cross-coupling reactions for the construction of tertiary stereocenters. Tetrahedron 2013; 69:5799-5817. [PMID: 23956470 DOI: 10.1016/j.tet.2013.05.001] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Elizabeth C Swift
- Department of Chemistry, University of California, Irvine, California 92697-2025
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39
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Zhang C, Yun J. Rh-catalyzed addition of β-carbonyl pinacol alkylboronates to aldehydes: asymmetric synthesis of γ-butyrolactones. Org Lett 2013; 15:3416-9. [PMID: 23773146 DOI: 10.1021/ol401468v] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The rhodium-catalyzed 1,2-addition of chiral benzylic secondary alkylboronic esters with a coordinating carbonyl group to aldehydes was demonstrated with high levels of enantiospecificity. Pinacol boronic ester derivatives can be employed directly for the addition in the presence of KHF2 without the use of corresponding trifluoroborate salts where retention of the configuration was observed. Enantiomerically enriched β,γ-diaryl-substituted γ-butyrolactones were synthesized in good yields.
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Affiliation(s)
- Changwan Zhang
- Department of Chemistry and Institute of Basic Science, Sungkyunkwan University, Suwon 440-746, Korea
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40
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Stereoretentive Pd-catalysed Stille cross-coupling reactions of secondary alkyl azastannatranes and aryl halides. Nat Chem 2013; 5:607-12. [PMID: 23787752 DOI: 10.1038/nchem.1652] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Accepted: 04/11/2013] [Indexed: 12/23/2022]
Abstract
The development of transition metal-catalysed cross-coupling reactions has greatly influenced the manner in which the synthesis of complex organic molecules is approached. A wide variety of methods are now available for the formation of C(sp(2))-C(sp(2)) bonds, and more recent work has focused on the use of C(sp(3)) electrophiles and nucleophiles. The use of secondary and tertiary alkyl nucleophiles in cross-coupling reactions remains a challenge because of the propensity of these alkyl groups to isomerize under the reaction conditions. Here, we report the development of a general Pd-catalysed process for the stereoretentive cross-coupling of secondary alkyl azastannatrane nucleophiles with aryl chlorides, bromides, iodides and triflates. Coupling partners with a wide range of electronic characteristics are well tolerated. The reaction occurs with minimal isomerization of the secondary alkyltin nucleophile, and with retention of absolute configuration. This process constitutes the first general method to use secondary alkyltin reagents in cross-coupling reactions.
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41
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Kamimura A, So M, Ishikawa S, Uno H. Pd-Catalyzed Tandem sp2–sp3 Coupling Reactions of Chiral Stannolanes: An Efficient Preparation of Optically Active Tetrahydrobenz[f]isoindoles. Org Lett 2013; 15:1402-5. [DOI: 10.1021/ol4003948] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Akio Kamimura
- Department of Applied Molecular Bioscience, Yamaguchi University, Ube, 755-8611, Japan, and Department of Chemistry, Graduate School of Science and Engineering, Ehime University, Matsuyama, 790-8577, Japan
| | - Masahiro So
- Department of Applied Molecular Bioscience, Yamaguchi University, Ube, 755-8611, Japan, and Department of Chemistry, Graduate School of Science and Engineering, Ehime University, Matsuyama, 790-8577, Japan
| | - Shingo Ishikawa
- Department of Applied Molecular Bioscience, Yamaguchi University, Ube, 755-8611, Japan, and Department of Chemistry, Graduate School of Science and Engineering, Ehime University, Matsuyama, 790-8577, Japan
| | - Hidemitsu Uno
- Department of Applied Molecular Bioscience, Yamaguchi University, Ube, 755-8611, Japan, and Department of Chemistry, Graduate School of Science and Engineering, Ehime University, Matsuyama, 790-8577, Japan
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42
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Molander GA, Wisniewski SR. Stereospecific cross-coupling of secondary organotrifluoroborates: potassium 1-(benzyloxy)alkyltrifluoroborates. J Am Chem Soc 2012; 134:16856-68. [PMID: 23025482 PMCID: PMC3481220 DOI: 10.1021/ja307861n] [Citation(s) in RCA: 161] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Potassium 1-(alkoxy/acyloxy)alkyltrifluoroborates have been synthesized through a copper-catalyzed diboration of aldehydes and subsequent conversion of the resulting potassium 1-(hydroxy)alkyltrifluoroborates. The palladium-catalyzed Suzuki-Miyaura reaction employing the potassium 1-(benzyloxy)alkyltrifluoroborates with aryl and heteroaryl chlorides provides access to protected secondary alcohols in high yields. The β-hydride elimination pathway is avoided through use of the benzyl protecting group, which is proposed to stabilize the diorganopalladium intermediate by coordination of the arene to the metal center. This cross-coupling is stereospecific with complete retention of stereochemistry.
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Affiliation(s)
- Gary A Molander
- Roy and Diana Vagelos Laboratories, Penn/Merck Laboratory for High-Throughput Experimentation, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, USA.
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Alam M, Wise C, Baxter CA, Cleator E, Walkinshaw A. Development of a Robust Procedure for the Copper-catalyzed Ring-Opening of Epoxides with Grignard Reagents. Org Process Res Dev 2012. [DOI: 10.1021/op200329x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mahbub Alam
- Global Process Chemistry, Merck Sharp and Dohme Ltd., Hertford Road, Hoddesdon EN11 9BU, U.K
| | - Christopher Wise
- Global Process Chemistry, Merck Sharp and Dohme Ltd., Hertford Road, Hoddesdon EN11 9BU, U.K
| | - Carl A. Baxter
- Global Process Chemistry, Merck Sharp and Dohme Ltd., Hertford Road, Hoddesdon EN11 9BU, U.K
| | - Ed Cleator
- Global Process Chemistry, Merck Sharp and Dohme Ltd., Hertford Road, Hoddesdon EN11 9BU, U.K
| | - Andrew Walkinshaw
- Global Process Chemistry, Merck Sharp and Dohme Ltd., Hertford Road, Hoddesdon EN11 9BU, U.K
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Awano T, Ohmura T, Suginome M. Inversion or retention? Effects of acidic additives on the stereochemical course in enantiospecific Suzuki-Miyaura coupling of α-(acetylamino)benzylboronic esters. J Am Chem Soc 2011; 133:20738-41. [PMID: 22129167 DOI: 10.1021/ja210025q] [Citation(s) in RCA: 155] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The stereochemical course of the stereospecific Suzuki-Miyaura coupling of enantioenriched α-(acetylamino)benzylboronic esters with aryl bromides can be switched by the choice of acidic additives in the presence of a Pd/XPhos catalyst system. Highly enantiospecific, invertive C-C bond formation takes place with the use of phenol as an additive. In contrast, high enantiospecificity for retention of configuration is attained in the presence of Zr(Oi-Pr)(4)·i-PrOH as an additive.
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Affiliation(s)
- Tomotsugu Awano
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Kyoto 615-8510, Japan
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